Heat Pump Payback in Dunwoody, GA
Will a heat pump pay off in Dunwoody, GA?
Dunwoody technically pencils out, but only past the point the equipment would need replacing anyway. Swap a failed furnace and AC for a heat pump rather than buying like-for-like, and the extra cost here runs $5,500. Dunwoody's residents would see roughly $344 a year back in running costs, putting the payback around 16 years. Dunwoody's own numbers say this pencils out only in theory, not in practice.
Compare against another city
Landed on Dunwoody by mistake, or want to compare it against somewhere else? Search the other 3206 cities below.
The climate behind Dunwoody's payback figure
Dunwoody has a mild winter by US standards, 2569 heating degree days a year against a 65°F base, and summers are hot enough that cooling matters as much as heating, at 1846 cooling degree days. 12°F is the figure equipment gets sized against here, the 99th-percentile cold snap, not an average day, with a low of 10.9°F in the 2024 station record. Worked through the model, that's a seasonal COP of 2.99 on the cold-climate unit fit for this climate. The average winter here is gentle, but sizing follows the cold snaps, and 12°F is below the 25°F point where a standard unit leans on resistance backup, so a cold-climate unit is what gets priced for Dunwoody. Climate figures trace to the nearest NOAA station, Dekalb-Peachtree Airport, 4.6 miles from Dunwoody.
Dunwoody's running-cost comparison, in dollars
Electricity use for heating alone comes out to about 2,176 kWh a year on the 2000-square-foot reference house; folding in cooling puts the electric bill near $559 a year. That compares with roughly 27 Mcf a year of gas at Dunwoody's $20.42 per-Mcf rate, about $903 a year with the old AC included, against a local electricity rate of 14.90¢/kWh. Priced as a standalone purchase, with a working furnace ripped out early, payback would take longer than the 15-year equipment life. Measured against the like-for-like replacement instead, a household here ends 15 years $338 behind.
What would change Dunwoody's answer
This result holds unless electricity climbs above 40.3¢/kWh (it is 14.90¢ now) or gas drops below $7.56 per Mcf (now $20.42); past either point, gas becomes the cheaper fuel in Dunwoody. When quotes arrive, compare the heat pump price with a like-for-like furnace and AC replacement: at $344 a year saved, a difference under $2,408 pays back within 7 years here, and under $3,440 within 10.
The other scenario: no gas furnace to begin with
Plenty of homes in Dunwoody heat with electricity alone, no gas line involved. Swap the comparison to resistance heat instead of gas, and Dunwoody's answer improves. About $767 a year comes back this way, enough that the 13-year payback clears the $10,000 premium comfortably within the equipment's life.
Where Dunwoody ranks in this dataset
Ranked against the other 3206 cities covered, Dunwoody comes in at 2108 for heating severity, 1 would be the coldest place in the dataset, and 786 by population, where 1 is largest. That's the middle third for winter severity among the cities covered here.
Deciding what's next in Dunwoody, GA
About 51,795 people live in Dunwoody, Georgia, and every number on this page is what a contractor would actually work from when quoting a system here, the point isn't to replace that quote, it's to tell you whether to bother asking for one. Here, there's no cost penalty to waiting until your current furnace or AC actually needs replacing.
Line up a few local HVAC quotes before you decide.
Where Dunwoody's figure comes from
Nothing above is a black box: the methodology guide shows the full arithmetic behind Dunwoody's 2.99 seasonal COP and payback figure. Dunwoody's 12°F design temperature is below the 25°F line, which is why a cold-climate unit is the right call here, see what that changes in the cold-climate unit guide.